MAF Calibration 101

[Asthma]

Thanks for your quick answer. It's an normal Injen CAI, no modifications or something like that. Basically I had this issue over a long time, even if had driven the car for a long period of time the STFT is quite high and the ltft is low. Do I something fundamental wrong? As I said the actual and desired AFR is close to each other. Over ~3,25V the LTFT is not recorded as I know, should the STFT also at zero because I'm Openloop?

[Steve @ VersaTune]

It's possible that there's an air leak or some kind of lump in your maf table. Post a log using the MAF Cal preset and your tune or a screen shot of your MAF table.

[Asthma]

Hi,

attached you will find the MAF numbers, Screenshot and the requested datalog. For sure, the calibration can be better, but I'm still focused to the high STFT.

I will search for some Air leaks again, but I tought I did it properly last time.

THX

[mituc]

The STFTs are higher only in open loop in your case, which is perfectly normal.

[Asthma]

Can't believe... I'd checked some random logs from other guys and never saw such high STFT. Are you quite sure?

[Steve @ VersaTune]

important detail that it only happens in open loop

[mituc]

Can't believe... I'd checked some random logs from other guys and never saw such high STFT. Are you quite sure?

I am quite sure... about 1475.325% sure. Or, wait!, 1475.327%!

[Asthma]

Don't get me wrong, the internet is full of different statements and in my case I only wan't to make sure that's all fine. I'm very happy about your help.

Thank you

[vortk355]

"Log using the MAF Calibration preset in VersaTuner’s virtual dashboard"
I cannot find this on the dashboard, is there a button I am missing?

[Ugnius @ VersaTune]

What is your car?